Decay of Se81m and Se81

Abstract

The gamma rays in Se81 and Br81 following the decay of Se81m and Se81 were studied with a magnetic spectrograph. Three internal conversion lines were observed in these measurements. Gamma-ray spectra taken with a NaI(Tl) detector indicated a transition at 30 keV in addition to previously reported gamma rays. Measurements were made of spectra of gamma rays in coincidence with gamma rays in five energy regions. The results indicate levels at 280 keV, 560 keV and 832 keV in Br81 and agree with the main features of the decay scheme proposed by Krause et al. Beta-gamma coincidence measurements showed that the 560 keV level in Br81 is a different level than the 550 keV level which is excited in (p, [gamma]) and ([gamma], [gamma]') reactions. Intensities of the transitions were computed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/32287/1/0000354.pd